long-distance call
A telephone call to a different city or area code, as opposed to a local call (市内電話).
When making a long-distance call, don't forget the area code.
市内電話 is a local call within the same city or area, while 市外電話 is a long-distance call to a different area.
国際電話 is an international call, while 市外電話 is a domestic long-distance call.
Compound of 市外 (outside the city) and 電話 (telephone).